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• Need to create a .mj2 video from .j2k (or other jpeg2000) images and then extract lossleslsly [closed]

  9 novembre 2024, par George zaher

  I need a hand in creating an mj2 video or mp4 that can be created lossless from .j2k images

  


  for example extract mp4 to *.j2k images and then create back

  


  Best Regards
George

  


  I tried using image magic, openjpeg2000 library, ffmpeg, nothing worked out

  


• ffplay custom command to seek 5 instead of 10 seconds

  6 septembre 2018, par beta

  In ffplay the left/right arrows can be used to skip forward/back 10 seconds. Can I somehow create a custom shortcut (or replace the existing one) to skip only 5 or 3 seconds ?

• Detect FFmpeg installation and Version

  6 mars 2016, par Aaron

  I’m writing a PHP script that converts uploaded video files to FLV on the fly, but I only want it to run that part of the script if the user has FFmpeg installed on the server.

  Would there be a way to detect this ahead of time ? Could I perhaps run an FFmpeg command and test whether it comes back "command not found ?"